Protractor



FIG. 1 is a top and front perspective view of a protractor showing my new design;

FIG. 2 is a bottom and rear perspective view;

FIG. 3 is a top and front perspective view, shown in a condition of use;

FIG. 4 is a top and front perspective view, shown in an alternate condition of use; and,

FIG. 5 is a top plan view thereof, shown with the slidable members fully extended. 

The ornamental design for a protractor, as shown. 